If the Fed raises the legal reserve requirement to 40 percent, and if the total money supply is at its maximum and is $750, the initial deposit must have been

In a perfectly competitive market, a marginal entrant:

A) earns positive economic profits in the long run. B) is the first firm to enter a market. C) is indifferent between entering and not entering. D) determines the market price of the good it produces.

Over the past two decades, total and per capita water use in the United States have:

A. both increased. B. leveled off and fallen, respectively. C. fallen and leveled off, respectively. D. increased and fallen, respectively.